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CVE-2021-41166

Permission bypass in Nextcloud Android App

The Nextcloud Android app is the Android client for Nextcloud, a self-hosted productivity platform. An issue in versions prior to 3.17.1 may lead to sensitive information disclosure. An unauthorized app that does not have the otherwise required `MANAGE_DOCUMENTS` permission may view image thumbnails for images it does not have permission to view. Version 3.17.1 contains a patch. There are no known workarounds.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Vendors
Nextcloud
Products
Nextcloud
CVE-2021-41239

User enumeration setting not respected in Nextcloud server

Nextcloud server is a self hosted system designed to provide cloud style services. In affected versions the User Status API did not consider the user enumeration settings by the administrator. This allowed a user to enumerate other users on the instance, even when user listings where disabled. It is recommended that the Nextcloud Server is upgraded to 20.0.14, 21.0.6 or 22.2.1. There are no known workarounds.

CVSS 3.1 · 5.3 Medium EPSS 1.2% KEV · Not listed
Vendors
Nextcloud
Products
Nextcloud Server
CVE-2021-41241

Advanced permissions is not respected for subfolders in Nextcloud server

Nextcloud server is a self hosted system designed to provide cloud style services. The groupfolders application for Nextcloud allows sharing a folder with a group of people. In addition, it allows setting "advanced permissions" on subfolders, for example, a user could be granted access to the groupfolder but not specific subfolders. Due to a lacking permission check in affected versions, a user could still access these subfolders by copying the groupfolder to another location. It is recommended that the Nextcloud Server is upgraded to 20.0.14, 21.0.6 or 22.2.1. Users unable to upgrade should disable the "groupfolders" application in the admin settings.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Vendors
Nextcloud
Products
Nextcloud Server
CVE-2021-41233

Missing authorization in Nextcloud text

Nextcloud text is a collaborative document editing using Markdown built for the nextcloud server. Due to an issue with the Nextcloud Text application, which is by default shipped with Nextcloud Server, an attacker is able to access the folder names of "File Drop". For successful exploitation an attacker requires knowledge of the sharing link. It is recommended that users upgrade their Nextcloud Server to 20.0.14, 21.0.6 or 22.2.1. Users unable to upgrade should disable the Nextcloud Text application in the application settings.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Vendors
Nextcloud
Products
Nextcloud Server
CVE-2022-24886

Exposure of Sensitive Information to an Unauthorized Actor in com.nextcloud.client

Nextcloud Android app is the Android client for Nextcloud, a self-hosted productivity platform. In versions prior to 3.19.0, any application with notification permission can access contacts if Nextcloud has access to Contacts without applying for the Contacts permission itself. Version 3.19.0 contains a fix for this issue. There are currently no known workarounds.

CVSS 3.1 · 2.2 Low EPSS < 1% KEV · Not listed
Vendors
Nextcloud
Products
Nextcloud
CVE-2022-24888

Possible Injection in Nextcloud Server

Nextcloud Server is the file server software for Nextcloud, a self-hosted productivity platform. Prior to versions 20.0.14.4, 21.0.8, 22.2.4, and 23.0.1, it is possible to create files and folders that have leading and trailing \n, \r, \t, and \v characters. The server rejects files and folders that have these characters in the middle of their names, so this might be an opportunity for injection. This issue is fixed in versions 20.0.14.4, 21.0.8, 22.2.4, and 23.0.1. There are currently no known workarounds.

CVSS 3.1 · 4.3 Medium EPSS 1.3% KEV · Not listed
Vendors
Nextcloud
Products
Nextcloud Server
CVE-2022-29163

Bypass of password requirements when sharing a folder via the Circles app in Nextcloud Server

Nextcloud Server is the file server software for Nextcloud, a self-hosted productivity platform. Prior to versions 22.2.6 and 23.0.3, a user can create a link that is not password protected even if the administrator requires links to be password protected. Versions 22.2.6 and 23.0.3 contain a patch for this issue. There are currently no known workarounds.

CVSS 3.1 · 3.5 Low EPSS 1.1% KEV · Not listed
Vendors
Nextcloud
Products
Nextcloud Server
CVE-2022-29243

Improper input-size validation on the user new session name in Nextcloud Server

Nextcloud Server is the file server software for Nextcloud, a self-hosted productivity platform. Prior to versions 22.2.7 and 23.0.4, missing input-size validation of new session names allows users to create app passwords with long names. These long names are then loaded into memory on usage, resulting in impacted performance. Versions 22.2.7 and 23.0.4 contain a fix for this issue. There are currently no known workarounds available.

CVSS 3.1 · 4.3 Medium EPSS 1.6% KEV · Not listed
Vendors
Nextcloud
Products
Nextcloud Server
CVE-2022-31118

Missing brute force protection on cloud federation sharing in Nextcloud Server

Nextcloud server is an open source personal cloud solution. In affected versions an attacker could brute force to find if federated sharing is being used and potentially try to brute force access tokens for federated shares (`a-zA-Z0-9` ^ 15). It is recommended that the Nextcloud Server is upgraded to 22.2.9, 23.0.6 or 24.0.2. Users unable to upgrade may disable federated sharing via the Admin Sharing settings in `index.php/settings/admin/sharing`.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Vendors
Nextcloud
Products
Nextcloud Server
CVE-2022-31120

Federated share accepting/declining is not logged in audit log in Nextcloud Server

Nextcloud server is an open source personal cloud solution. The audit log is used to get a full trail of the actions which has been incompletely populated. In affected versions federated share events were not properly logged which would allow brute force attacks to go unnoticed. This behavior exacerbates the impact of CVE-2022-31118. It is recommended that the Nextcloud Server is upgraded to 22.2.7, 23.0.4 or 24.0.0. There are no workarounds available.

CVSS 3.1 · 2.1 Low EPSS < 1% KEV · Not listed
Vendors
Nextcloud
Products
Nextcloud Server
CVE-2022-36074

Authentication headers exposed on by Nextcloud Server

Nextcloud server is an open source personal cloud product. Affected versions of this package are vulnerable to Information Exposure which fails to strip the Authorization header on HTTP downgrade. This can lead to account access exposure and compromise. It is recommended that the Nextcloud Server is upgraded to 23.0.7 or 24.0.3. It is recommended that the Nextcloud Enterprise Server is upgraded to 22.2.11, 23.0.7 or 24.0.3. There are no known workarounds for this issue.

CVSS 3.1 · 6.4 Medium EPSS < 1% KEV · Not listed
Vendors
Nextcloud
Products
Nextcloud Enterprise Server Nextcloud Server
CVE-2022-39211

Server-Side Request Forgery (SSRF) via potential filter bypass in Nextcloud Server

Nextcloud server is an open source personal cloud platform. In affected versions it was found that locally running webservices can be found and requested erroneously. It is recommended that the Nextcloud Server is upgraded to 23.0.8 or 24.0.4. It is recommended that the Nextcloud Enterprise Server is upgraded to 22.2.10.4, 23.0.8 or 24.0.4. There are no known workarounds for this issue.

CVSS 3.1 · 3 Low EPSS < 1% KEV · Not listed
Vendors
Nextcloud
Products
Nextcloud Enterprise Server Nextcloud Server
CVE-2022-39210

Access to internal files of the Nextcloud Android app

Nextcloud android is the official Android client for the Nextcloud home server platform. Internal paths to the Nextcloud Android app files are not properly protected. As a result access to internal files of the from within the Nextcloud Android app is possible. This may lead to a leak of sensitive information in some cases. It is recommended that the Nextcloud Android app is upgraded to 3.21.0. There are no known workarounds for this issue.

CVSS 3.1 · 3.2 Low EPSS < 1% KEV · Not listed
Vendors
Nextcloud
Products
Nextcloud
CVE-2022-39346

Missing length validation of user displayname in nextcloud server

Nextcloud server is an open source personal cloud server. Affected versions of nextcloud server did not properly limit user display names which could allow a malicious users to overload the backing database and cause a denial of service. It is recommended that the Nextcloud Server is upgraded to 22.2.10, 23.0.7 or 24.0.3. There are no known workarounds for this issue.

CVSS 3.1 · 3.5 Low EPSS 1.1% KEV · Not listed
Vendors
Fedoraproject Nextcloud
Products
Fedora Nextcloud Enterprise Server Nextcloud Server
CVE-2022-41971

Nextcloud Talk guests can continue to receive video streams from call after being removed from a conversation

Nextcould Talk android is a video and audio conferencing app for Nextcloud. Prior to versions 12.2.8, 13.0.10, 14.0.6, and 15.0.0, guests can continue to receive video streams from a call after being removed from a conversation. An attacker would be able to see videos on a call in a public conversation after being removed from that conversation, provided that they were removed while being in the call. Versions 12.2.8, 13.0.10, 14.0.6, and 15.0.0 contain patches for the issue. No known workarounds are available.

CVSS 3.1 · 4.8 Medium EPSS < 1% KEV · Not listed
Vendors
Nextcloud
Products
Nextcloud Talk
CVE-2022-24741

High memory usage in Nextcloud server

Nextcloud server is an open source, self hosted cloud style services platform. In affected versions an attacker can cause a denial of service by uploading specially crafted files which will cause the server to allocate too much memory / CPU. It is recommended that the Nextcloud Server is upgraded to 21.0.8 , 22.2.4 or 23.0.1. Users unable to upgrade should disable preview generation with the `'enable_previews'` config flag.

CVSS 3.1 · 3.5 Low EPSS 1.6% KEV · Not listed
Vendors
Nextcloud
Products
Nextcloud Server
CVE-2022-24885

Improper Authentication in Nextcloud Android Files

Nextcloud Android app is the Android client for Nextcloud, a self-hosted productivity platform. Prior to version 3.19.1, users can bypass a lock on the Nextcloud app on an Android device by repeatedly reopening the app. Version 3.19.1 contains a fix for the problem. There are currently no known workarounds.

CVSS 3.1 · 2 Low EPSS < 1% KEV · Not listed
Vendors
Nextcloud
Products
Nextcloud
CVE-2022-24889

Insufficient Verification of Data Authenticity in Nextcloud Server

Nextcloud Server is the file server software for Nextcloud, a self-hosted productivity platform. Prior to versions 21.0.8, 22.2.4, and 23.0.1, it is possible to trick administrators into enabling "recommended" apps for the Nextcloud server that they do not need, thus expanding their attack surface unnecessarily. This issue is fixed in versions 21.0.8 , 22.2.4, and 23.0.1.

CVSS 3.1 · 2.4 Low EPSS < 1% KEV · Not listed
Vendors
Nextcloud
Products
Nextcloud Server
CVE-2022-29160

Sensitive files/data exist after deletion of user account in Nextcloud Android

Nextcloud Android is the Android client for Nextcloud, a self-hosted productivity platform. Prior to version 3.19.0, sensitive tokens, images, and user related details exist after deletion of a user account. This could result in misuse of the former account holder's information. Nextcloud Android version 3.19.0 contains a patch for this issue. There are no known workarounds available.

CVSS 3.1 · 2.8 Low EPSS < 1% KEV · Not listed
Vendors
Nextcloud
Products
Nextcloud
CVE-2022-31131

Ownership check missing when updating or deleting mail attachments in Nextcloud mail

Nextcloud mail is a Mail app for the Nextcloud home server product. Versions of Nextcloud mail prior to 1.12.2 were found to be missing user account ownership checks when performing tasks related to mail attachments. Attachments may have been exposed to incorrect system users. It is recommended that the Nextcloud Mail app is upgraded to 1.12.2. There are no known workarounds for this issue. ### Workarounds No workaround available ### References * [Pull request](https://github.com/nextcloud/mail/pull/6600) * [HackerOne](https://hackerone.com/reports/1579820) ### For more information If you have any questions or comments about this advisory: * Create a post in [nextcloud/security-advisories](https://github.com/nextcloud/security-advisories/discussions) * Customers: Open a support ticket at [support.nextcloud.com](https://support.nextcloud.com)

CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed
Vendors
Nextcloud
Products
Nextcloud Mail